JP2511831Y2 - Heat exchanger - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for cooling lubricating oil with cooling water, and more particularly to an improvement of an oil cooler installed in a lower tank of the heat exchanger.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a conventional heat exchanger 1 of this type includes an upper tank (not shown), a lower tank 2, and a plurality of flat tubes 3 between the upper and lower tanks.
It is composed of a core portion 5 in which the flat tubes 3 are connected by bellows-like fins 4 and the cooling water outflow port 6 formed almost at the center of the lower tank 2 has a pipe 7 Is provided.

Reference numeral 8 is an oil cooler main body installed in the lower tank 2, in which an outer pipe 9 and an inner pipe 10 are concentrically arranged with an appropriate interval, and both ends of the inner and outer pipes 9 and 10 are sealed. When the oil flow chamber 11 is formed by the above, the oil flow chamber 11 is of a double pipe type in which the inner fins 12 are arranged.

Reference numeral 13 denotes an oil feed pipe provided near the right end of the outer pipe 9, and 14 denotes an oil feed pipe provided near the left end of the outer pipe 9 via a fixing metal fitting 15 inserted through the pipes 13 and 14. An oil cooler body 8 is attached to the inner wall of the.

The cooling water flowing into the upper tank of the heat exchanger 1 is cooled by the air passing through the bellows-like fins 4 while flowing down in the flat tubes 3 and flows into the lower tank 2. Then, the oil is discharged from the pipe 7 of the cooling water outlet 6, but during this time, the oil feed pipe 1 of the oil cooler body 8 is discharged.
The oil flowing into the oil flow chamber 11 from 3 is cooled by the cooling water flowing in the lower tank 2 while passing between the inner fins 12, and is discharged from the oil delivery pipe 14.

[0006]

However, in the conventional device as described above, as shown in FIG. 5, when the cooling water outlet 6 of the lower tank 2 is located at the central portion, each flat tube is Cooling water W ₁ flowing into the lower tank 2 from
Most of W ₂ flows into the cooling water outlet 6 around the outside of the outer pipe 9 from the left-right direction of the oil cooler body 8. That is, the cooling water W ₁ , W ₂ flows into the inner pipe 10 of the oil cooler body 8 through the left and right openings 10a, 10b, respectively.

Therefore, the cooling water hardly flows in the inner pipe 10. As a result, there is a drawback that heat exchange is hardly performed in the inner pipe 10 of the oil cooler body 8 and a desired cooling effect cannot be obtained. Therefore, in order to make up for this shortage, conventionally, the size of the oil cooler body 8 is increased, or the cooling water outlet 6 of the lower tank 2 is used.
Although the installation position has been changed, there is a drawback that the layout becomes complicated and the cost increases.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and makes the flow path of cooling water flowing in the lower tank longer.
The purpose of the present invention is to provide an oil cooler with improved heat exchange efficiency, and its gist is to provide a cooling water outlet in the approximate center of the lower tank of the heat exchanger. A double pipe type oil cooler in which the oil that cools between the outer pipe and the inner pipe flows over the entire length of the tank is arranged. The heat exchanger is characterized in that a partition plate that is sealed to the outer pipe of the oil cooler and the inner wall of the lower tank is provided at a position closer to the side.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS. 1 is a front view of a main part of an air-cooling heat exchanger having an oil cooler according to the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is an air-cooling heat exchange having the oil cooler built-in. It is a principal part perspective view of the container, and the same reference numerals as those of the conventional example in the drawing indicate the same parts.

In the figure, 1 is an air-cooling heat exchanger, 8 is an oil cooler main body, and these have the same structure as those in FIGS. 4 and 5 described above, so only the differences will be described below.

Reference numeral 16 denotes a partition plate installed in the lower tank 2 of the heat exchanger 1, which is provided on the right side of the cooling water outlet 6 formed at the substantially center of the lower tank 2, and the inside of the lower tank 2 is the partition plate. The chamber 16 is divided into a right chamber 17 and a left chamber 18. The partition plate 16 is sealed by the outer pipe 9 of the oil cooler main body 8 and the inner wall of the lower tank 2, respectively, and the oil cooler main body 8 penetrates the partition plate 16 to substantially cover the lower tank 2. It is installed over the entire length and is arranged in the right chamber 17 and the left chamber 18 in the lower tank 2.

Therefore, as shown in FIG. 2, the cooling water W that has flowed down in each flat tube 3 and is cooled by the bellows-shaped fins 4 during that time flows into the lower tank 2, but into the lower tank 2. Since the partition plate 16 is installed on the right side of the cooling water outlet 6, it is regulated to flow in one direction. That is, the cooling water W ₁ that has flowed into the right chamber 17 in the lower tank 2 passes through the outside of the oil cooler body 8 and flows from the right end opening 10 a into the inner pipe 1.
0 inside, and flows into the left chamber 18 through the left end opening 10b.

Then, the cooling water W ₁ is reversed in the left chamber 18, merges with the cooling water W ₂ flowing down in each flat tube 3 and flowing into the left chamber 18, and the outside of the oil cooler body 8 is directed to the right. To the cooling water outflow port 6 which is blocked by the partition plate 16 and is formed in front of the partition plate 16 and is discharged through the outflow pipe 7.

As a result, the oil flowing from the oil feed pipe 13 into the oil flow chamber 11 is sufficiently cooled by the cooling water in the lower tank 2 and is fed from the oil feed pipe 14, and the cooler body 8 The cooling efficiency of is greatly improved.

Due to the layout and the installation position of the drain plug and the water temperature sensor, the partition plate 1
When 6 is installed on the left side of the cooling water outlet 6 contrary to the embodiment, only the direction of the cooling water flow is reversed and the cooling effect of the oil cooler body 8 is not affected. .

[0016]

As described above, the heat exchanger according to the present invention is provided with the cooling water outlet at the center of the lower tank of the heat exchanger, and the entire length of the heat exchanger is provided in the lower tank. A double pipe type oil cooler in which the oil for cooling between the outer pipe and the inner pipe flows is arranged, and the position is closer to one of the left and right sides which is deviated from the cooling water outlet. Since the outer pipe of the oil cooler and the inner wall of the lower tank are each provided with a sealed partition plate, if the cooling water always flows inside the inner pipe of the oil cooler body, the partition plate The cooling water flowing into the right side flows outside the oil cooler body and inside the inner pipe, and the cooling water flowing into the left side of the partition plate flows outside the oil cooler body. The flow path up to Exchange efficiency is effective, such as significantly improved.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a heat exchanger including an oil cooler according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view of a main part of a heat exchanger incorporating the oil cooler.

FIG. 4 is a front view of a main part of a conventional heat exchanger having a built-in oil cooler.

FIG. 5 is a sectional view taken along line II-II of FIG. 4;

[Explanation of symbols]

1 Heat Exchanger 2 Lower Tank 3 Flat Tube 4 Fin 5 Core Part 6 Cooling Water Outlet 8 Oil Cooler Main Body 9 Outer Pipe 10 Inner Pipe 11 Oil Flow Chamber 12 Inner Fin 13 Oil Inlet Pipe 14 Oil Delivery Pipe 16 Partition Plate 17 Right Room 18 Left room W ₁ Cooling water W ₂ Cooling water

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Okamoto 3-5-1 Fujisaki, Kawasaki-ku, Kawasaki-shi, Kanagawa Tokyo Radiator Manufacturing Co., Ltd. (72) Tamio Komatsubara 3-chome, Fujisaki, Kawasaki-ku, Kanagawa Prefecture No. 1 Tokyo Radiator Manufacturing Co., Ltd. (72) Inventor Fumio Gyoda 3-5-1 Fujisaki, Kawasaki-ku, Kawasaki-shi, Kanagawa Tokyo Radiator Manufacturing Co., Ltd. (56) Bibliography 3-21674 (JP, U) ) Actual Kaihei 3-19429 (JP, U) Actual public Sho 60-19948 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A cooling system for cooling the lower tank of a heat exchanger in the approximate center of the tank.
When a water outlet is provided, the
The oil that cools between the outer pipe and the inner pipe over the entire length is
It is equipped with a flowing double-tube type oil cooler.
The position near the left or right side, which is off the cooling water outlet
Of the oil cooler and the lower tank.
It is characterized by providing a partition plate that is sealed to the inner wall
Heat exchanger to.